text: class Solution(object):
      def twoSum(self, nums, target):
          """
          :type nums: List[int]
          :type target: int
          :rtype: List[int]
          """
          for i in range(len(nums)-1):
              for j in range(i+1,len(nums)):
                  if nums[i] + nums[j] == target:
                      return [i,j]